package com.kla.power.util;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.io.Serializable;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**
 * redis工具类
 */

@Component
public class RedisUtils {

    private static RedisTemplate redisTemplate;

    @Autowired (required = false)
    public void setRedisTemplate (RedisTemplate redisTemplate) {
//        RedisSerializer redisSerializer = new FastJsonRedisSerializer ( Object.class );
//        redisTemplate.setKeySerializer ( redisSerializer );
//        redisTemplate.setValueSerializer ( redisSerializer );
//        redisTemplate.setHashKeySerializer ( redisSerializer );
//        redisTemplate.setHashValueSerializer ( redisSerializer );
        this.redisTemplate = redisTemplate;
    }

    // ================================通用=================================

    /**
     * 获取缓存过期时间
     * @param key
     */
    public static Long getExpire (String key) {
        return redisTemplate.getExpire ( key );
    }

    /**
     * 获取缓存过期时间， 并换算成指定单位
     * @param key
     */
    public static Long getExpire (String key, TimeUnit timeUnit) {
        return redisTemplate.getExpire ( key, timeUnit );
    }


    /**
     * 删除缓存数据
     * @param key
     */
    public static boolean delete (String key) {
        return redisTemplate.delete ( key );
    }

    /**
     * 批量删除缓存数据
     * @param keys
     */
    public static Long deleteList (List<String> keys) {
        return redisTemplate.delete ( CollectionUtils.arrayToList ( keys ) );
    }


    /**
     * 指定缓存失效时间
     * @param key  键
     * @param time 时间(秒)
     * @return
     */
    public static boolean expire (String key, long time) {
        try {
            if ( time > 0 ) {
                redisTemplate.expire ( key, time, TimeUnit.SECONDS );
            }
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }


    // ================================String=================================

    /**
     * 获取string缓存
     * @param key
     * @return
     */
    public static Object get (String key) {
        return key == null ? null : redisTemplate.opsForValue ().get ( key );
    }

    /**
     * 设置string缓存
     * @param key
     * @param value
     */
    public static void set (String key, String value) {
        redisTemplate.opsForValue ().set ( key, value );
    }

    /**
     * 设置string缓存
     * @param key
     * @param value
     */
    public static void set (String key, String value, Long time, TimeUnit timeUnit) {
        redisTemplate.opsForValue ().set ( key, value, time, timeUnit );
    }


    public static void set (String key, Object value, Long time, TimeUnit timeUnit) {
        ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue ();
        operations.set ( key, value, time, timeUnit );
    }

    /**
     * 设置string缓存超时时间默认秒钟
     * @param key
     * @param value
     * @param time
     */
    public static void set (String key, String value, Long time) {
        redisTemplate.opsForValue ().set ( key, value, time, TimeUnit.SECONDS );
    }


    public static Long incr (String key, long delta) {
        if ( delta < 0 ) {
            throw new RuntimeException ( "递增因子必须大于0" );
        }
        return redisTemplate.opsForValue ().increment ( key, delta );
    }

    /**
     * 递减
     * @param key   键
     * @param delta 要减少几(小于0)
     * @return
     */
    public static Long decr (String key, long delta) {
        if ( delta < 0 ) {
            throw new RuntimeException ( "递减因子必须大于0" );
        }
        return redisTemplate.opsForValue ().increment ( key, - delta );
    }

    // ================================Map=================================

    /**
     * HashGet
     * @param key  键 不能为null
     * @param item 项 不能为null
     * @return 值
     */
    public static Object hget (String key, String item) {
        return redisTemplate.opsForHash ().get ( key, item );
    }

    /**
     * 获取hashKey对应的所有键值
     * @param key 键
     * @return 对应的多个键值
     */
    public static Map<Object, Object> hmget (String key) {
        return redisTemplate.opsForHash ().entries ( key );
    }

    /**
     * HashSet
     * @param key 键
     * @param map 对应多个键值
     * @return true 成功 false 失败
     */
    public static boolean hmset (String key, Map<String, Object> map) {
        try {
            redisTemplate.opsForHash ().putAll ( key, map );
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * HashSet 并设置时间
     * @param key  键
     * @param map  对应多个键值
     * @param time 时间(秒)
     * @return true成功 false失败
     */
    public static boolean hmset (String key, Map<String, Object> map, long time) {
        try {
            redisTemplate.opsForHash ().putAll ( key, map );
            if ( time > 0 ) {
                expire ( key, time );
            }
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 向一张hash表中放入数据,如果不存在将创建
     * @param key   键
     * @param item  项
     * @param value 值
     * @return true 成功 false失败
     */
    public static boolean hset (String key, String item, Object value) {
        try {
            redisTemplate.opsForHash ().put ( key, item, value );
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 向一张hash表中放入数据,如果不存在将创建
     * @param key   键
     * @param item  项
     * @param value 值
     * @param time  时间(秒) 注意:如果已存在的hash表有时间,这里将会替换原有的时间
     * @return true 成功 false失败
     */
    public static boolean hset (String key, String item, Object value, long time) {
        try {
            redisTemplate.opsForHash ().put ( key, item, value );
            if ( time > 0 ) {
                expire ( key, time );
            }
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 删除hash表中的值
     * @param key  键 不能为null
     * @param item 项 可以使多个 不能为null
     */
    public static void hdel (String key, Object... item) {
        redisTemplate.opsForHash ().delete ( key, item );
    }

    /**
     * 判断hash表中是否有该项的值
     * @param key  键 不能为null
     * @param item 项 不能为null
     * @return true 存在 false不存在
     */
    public static boolean hHasKey (String key, String item) {
        return redisTemplate.opsForHash ().hasKey ( key, item );
    }

    /**
     * hash递增 如果不存在,就会创建一个 并把新增后的值返回
     * @param key  键
     * @param item 项
     * @param by   要增加几(大于0)
     * @return
     */
    public static double hincr (String key, String item, double by) {
        return redisTemplate.opsForHash ().increment ( key, item, by );
    }

    /**
     * hash递减
     * @param key  键
     * @param item 项
     * @param by   要减少记(小于0)
     * @return
     */
    public static double hdecr (String key, String item, double by) {
        return redisTemplate.opsForHash ().increment ( key, item, - by );
    }
    // ============================set=============================

    /**
     * 根据key获取Set中的所有值
     * @param key 键
     * @return
     */
    public static Set<Object> sGet (String key) {
        try {
            return redisTemplate.opsForSet ().members ( key );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return null;
        }
    }

    /**
     * 根据value从一个set中查询,是否存在
     * @param key   键
     * @param value 值
     * @return true 存在 false不存在
     */
    public static boolean sHasKey (String key, Object value) {
        try {
            return redisTemplate.opsForSet ().isMember ( key, value );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 将数据放入set缓存
     * @param key    键
     * @param values 值 可以是多个
     * @return 成功个数
     */
    public static long sSet (String key, Object... values) {
        try {
            return redisTemplate.opsForSet ().add ( key, values );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return 0;
        }
    }

    /**
     * 将set数据放入缓存
     * @param key    键
     * @param time   时间(秒)
     * @param values 值 可以是多个
     * @return 成功个数
     */
    public static long sSetAndTime (String key, long time, Object... values) {
        try {
            Long count = redisTemplate.opsForSet ().add ( key, values );
            if ( time > 0 ) {
                expire ( key, time );
            }

            return count;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return 0;
        }
    }

    /**
     * 获取set缓存的长度
     * @param key 键
     * @return
     */
    public static long sGetSetSize (String key) {
        try {
            return redisTemplate.opsForSet ().size ( key );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return 0;
        }
    }

    /**
     * 移除值为value的
     * @param key    键
     * @param values 值 可以是多个
     * @return 移除的个数
     */
    public static long setRemove (String key, Object... values) {
        try {
            Long count = redisTemplate.opsForSet ().remove ( key, values );
            return count;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return 0;
        }
    }
    // ===============================list=================================

    /**
     * 获取list缓存的内容
     * @param key   键
     * @param start 开始
     * @param end   结束 0 到 -1代表所有值
     * @return
     */
    public static List<Object> lGet (String key, long start, long end) {
        try {
            return redisTemplate.opsForList ().range ( key, start, end );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return null;
        }
    }

    /**
     * 获取list缓存的长度
     * @param key 键
     * @return
     */
    public static long lGetListSize (String key) {
        try {
            return redisTemplate.opsForList ().size ( key );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return 0;
        }
    }

    /**
     * 通过索引 获取list中的值
     * @param key   键
     * @param index 索引 index>=0时， 0 表头，1 第二个元素，依次类推；index<0时，-1，表尾，-2倒数第二个元素，依次类推
     * @return
     */
    public static Object lGetIndex (String key, long index) {
        try {
            return redisTemplate.opsForList ().index ( key, index );
        } catch ( Exception e ) {
            e.printStackTrace ();
            return null;
        }
    }

    /**
     * 将list放入缓存
     * @param key   键
     * @param value 值
     * @return
     */
    public static boolean lSet (String key, Object value) {
        try {
            redisTemplate.opsForList ().rightPush ( key, value );
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 将list放入缓存
     * @param key   键
     * @param value 值
     * @param time  时间(秒)
     * @return
     */
    public static boolean lSet (String key, Object value, long time) {
        try {
            redisTemplate.opsForList ().rightPush ( key, value );
            if ( time > 0 ) {
                expire ( key, time );
            }
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 将list放入缓存
     * @param key   键
     * @param value 值
     * @return
     */
    public static boolean lSet (String key, List<Object> value) {
        try {
            redisTemplate.opsForList ().rightPushAll ( key, value );
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 将list放入缓存
     * @param key   键
     * @param value 值
     * @param time  时间(秒)
     * @return
     */
    public static boolean lSet (String key, List<Object> value, long time) {
        try {
            redisTemplate.opsForList ().rightPushAll ( key, value );
            if ( time > 0 ) {
                expire ( key, time );
            }
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 根据索引修改list中的某条数据
     * @param key   键
     * @param index 索引
     * @param value 值
     * @return
     */
    public static boolean lUpdateIndex (String key, long index, Object value) {
        try {
            redisTemplate.opsForList ().set ( key, index, value );
            return true;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return false;
        }
    }

    /**
     * 移除N个值为value
     * @param key   键
     * @param count 移除多少个
     * @param value 值
     * @return 移除的个数
     */
    public static long lRemove (String key, long count, Object value) {
        try {
            Long remove = redisTemplate.opsForList ().remove ( key, count, value );
            return remove;
        } catch ( Exception e ) {
            e.printStackTrace ();
            return 0;
        }
    }
}
